Flavocetraria Kärnefelt & A. Thell

 

Type species: Flavocetraria cucullata (Bellardi) Kärnefelt & A. Thell

Description: A crustose lichen genus with many species.

Thallus fruticose, erect. Lobes once or twice dichotomously branched, ?at to subtubular. Upper surface more or less pale yellow, usually smooth and glossy; lower surface pale yellow; basal parts of the thallus generally duller, often reddish or brownish; pseudocyphellae as white spots on the lower surface; soredia absent or rare, marginal; isidia absent. Cortical layers thin. Medulla lax. Ascomata apothecia, zeorine, submarginal, at lobe ends, to 8 mm diam.; disc brown. Asci slenderly clavate, 8-spored. Spores ellipsoid, 5-10 x 3- 5.5 μm. Conidiomata pycnidia, black, marginal, protruding or on short projections. Conidia dumbbell-shaped, 6 x 1 μm.

Photobiont: Photobiont trebouxioid.

Chemistry: Usnic acid, lichesterinic acid complex and anthraquinones.

 

  1. Flavocetraria cucullata (Bellardi) Kärnefelt & A. Thell
  2. Flavocetraria minuscula (Elenkin & Savicz) Ahti, Poryadina & Zhurb.
  3. Flavocetraria nivalis (L.) Kärnefelt & A. Thell